this new law doesn't change that. it makes the process a bit tougher. parents will have to talk to a licensed healthcare practitioner and get a signature first. >> we want them to get the real facts rather than things they hear from internet or friends and family without hearing both sides of the story. >> reporter: the director of the department of pediatrics at valley medical center is surprised, at the last moment governor brown anded a religious exemption. parents with religious beliefs ruling out vaccinations don't have to jump through this hoop. >> perhaps with this new exception added to it, the bill won't be as effective. >> reporter: even so this new mom thinks it's a good idea. >> your relationship with your pediatrician is a partnership. >> reporter: dr. kim mulvihill, cbs 5, healthwatch. >>> from stanford university researchers say a virus may be able to stop an aggressive form of breast cancer. the research involved adding a tumor fighting protein to a harmless smallpox-type virus and giving it to mice with triple negative breast cancer. fu